Figure 3From: Solvability and stability of a fractional dynamical system of the growth of COVID-19 with approximate solution by fractional Chebyshev polynomialsThe dynamic evolution of system (21) when \(\nu =0.5\), for Brazil in March and April, respectively. In March the number of infections was per person, therefore, we used \((\varphi _{3},\psi _{3})\). In April the data was per \(K=1000\), therefore, we find that \((\varphi _{2},\psi _{2})\) is a suitable solutionBack to article page